Apparatus for molding plastic blocks



Aug.; r2, 1927;

A. MARTINDALE APPARATUS FOR MOLDING PLASTIC BLOCKS Filed Mayy 29, 1926 A TTORNE Y.

,y io mantling ,the apparatus.

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Patented Aug.r 2, 1927.

PATENT (ilFlClEL.l

y[ANDREW MARTINDALE, Aor Losy ANGELEsVoALIFonNrA. i

aPPARAfrnsron MoL'nrirG rLAsrid BLOCKS.

. Appiicgtion'aid May 29,

n This apparatus relates more specifically to a manuallyk operated machine for molding yplastic blocks, for building and "other pur-7 poses. f

main objcctof the invention is to prov4 vide ainanually operated machine for quicli-`l ly` forming `'plastic blocks and in'wliichthe finished blocks maybe readily removed from the 'machine ,without the necessityof dis?` Further ob 'ects and section taken on ".Iig'f is an'enlargedv sectionall plan detaily i kofione end of thernold form kshowing its front and rear' Walls and one of the latches. `In `the drawings I have illust-rated` a ma"- chinehavinga mold formes'pecia'lly adapted y for forming'segmental coredy plasticblocks" designed to kbe utilizedin the construction" 30 of circular cesspool\valls, buty it will be f clearly apparent that blocks of other coniigurationsand for many 'diferentuses mayy be made with equal facility. A.

Theapp'aratue is preferably designedto be niountediipon `a table 5 or other 'suitable support, consisting offatop 6, legs With tamper frame guidebars 8,` 9, formed of angle and'channel irons suitably ysecured to: the oppositelyidisposed `sides of the table,^,

their upper` ends bein verse beamr 10. i. y y

Bolted or otherwise suitably securedto the table top are machine supports 11, y12, that carry the rear stationary Wall r13of the .mold form. kThese supportsyarefs'ec'ured to the g joined :byy a transends of the mold Wall 13 and support the same a sufficient distance above the table topf to permit of the insertion and removal of a f e L38, 39, are provided theirlloiver ends being mold pallet 14 that restsupon a pairof wood bar supports 15. The'front Wall ltlofthe mold form consists of a main Wall 17 having end Walls 18,19 formed integrally therewith, i

the rear Wall 13 andthe front Wall 16 of the mold are of segmental form in order that they blocks may be readily assembled into a circular Wall such as is generally employed kin 19265y serial Nro. 112,441.

the construction of cesspools mold Walls at their upper andlower ends are provided with outwardly extending ilanges for the purposeof insuring strength and stability of structure. Main Wall 16 is secured to the table top b' means of strap ironfliinges 20, 21, `in or er that the Wall maybe swung downwardly in the position slioivnin dotted lines inFig. 2 to removethe it" pallet le carrying the finished molded block.

ini ai@ Itiwill beunderstood that a fresh palletis used for every molding operation.

" In order that the front and rear Walls of' the mold` form may be held rigidly in rela; Ition vtojeach other during av molding opera-' `tionllatches 25, 26, are employed. These latches are hinged to the rear Wall sup `orts [11,125 as bestfshown in Fig. 3,fand each ave f tongues 27 that engage the front Wall 1`76`of the mold.

In tli'eforrn of blockl molded by the ina-A` plurality of transverse ,openings in each lchine as k,illustrated it is desirable to' form f able drainage from the pool to the Vground surrounding the Wall may be insured. To

this end the reai stationary Wall l13 and the front'ivall v1G 'ofthe'swinging main Wall 17 are providedwvith aplura ity of circular openings 30 feach Ahaving -an voutwardly extendingfcircular flange 31 that form bearings forthe cylindrical plungers 32 as same are reciprocated through the openings on a moldi ingoperation. n fr f These" plungers are preferably yof solid formr and are connected together by an operating bar 33 that passes transversely through'the plungers 32 in `order to insure simultaneous operation, pins 34C preventing during an operation of. the apparatus.

The mechanism for operating the shaft 35 suitably secured in a pair of `bearings 36, 37, bolted to the table top. In order to actuate the plunger operating shaft 33, links 'a longitudinal shifting movement ofthe bar rigidly 'secured'to the rock shaft 35 and any binding movement of the plungers during their operation Aa vertically disposed posed guide tongues i8 termed onthe 'op positely disposed facesl ot the guide bars, 8, 9.v yFormed integrallyr with bar 45 are a plu rality ot downwardly extending bars 50, carryingvon their lover endsa tamper platek 5l, ot the saine form and size as the molding cavity ,ofV the mold,f\vhich it is adapted Yto enterl on' a tamping operation. Normally the tamper trame -is maintained in a retracted position above the mold form,sby means of a ypair of coiled springs V52, the springs being attached'at their ends to the bars 10 and 45.v f

- The operation ot the inachineis as tolloivs: The front Wall of the mold` is svvunOv into latched engagement With the rear wall and the ,pallet le is inserted below the mold.

Plastic material, such as concrete is thenY poured-into i the moldV cavity ,level with the y plunger openings;Vv The tamper tra-me is then aised fand loivered intoV the mold anumber otr timos to thoroughly tamp the material thercimatter which the plungers are reciprocated through the openlngs in the mold Walls byvmeans ot the actuating lever 40p ritter the above operation additional con'- crete is poured'into the inold'to till-the same and again tamped to insure 'the-density' ot the linished product.' The plunger frame' is' againv V'reciprocated to `VWithdraw, the plungers from thermold, and the main mold Wall 17 1s then unlatched and swung downwardly, f the lfinished rock resting onthe pallet being then` removed from the ma-A chine. y Y From the above description it will be ap# parent that I have provided a simple molding apparatusby means owvhich plastic blocks 'of a variety of configurations may be quickly and economically formed.

what i @nim iS= the same are in molding relation, a removable pallet disposedbelow the bottom of the mold to yclosevits lotver end opening, and a spring tamper mechanism disposed above the mold torptamping the plastic material after the same'has been introduced therein. u

V2. A machine for* forming plasticl bloclrs comprising a base support, a` moldk form mounted Von `said base and spaced thereabove, said frame including a stationary side Wall and a movable side Wall carrying end Walls hingedly secured to said base support,

agremovable,support tor closing the loiver end ot'sfaid mold` torni and supporting the molded block, a `plunger mechanism for Vformingr cavities in the molded block in ainolding opera-tion, and a tamper mechanism disposed abovethe mold form for tamping the plastic material asthe sameis introduced thereto. Y K y 8. A: machine Jfor ormingplastic blocks comprising a base support, ar metal ymold' consistingoiI a stationary side Wall, rigidly secured Vto said support and a movable front YWall carrying` end Walls hingedlyv secu-red to said support, latches pivoted to the stationaryV ivall and engaging' the movable Wall for locking the walls against movement when the saine are broughtA into operative relation to` each other, said side Walls having alinedy openingsr formed therein, a plunger mechanisnrincluding a plurality of plungers connected together for simultaneous movement, a rock shaft mounted on said ybase support, links connecting the plungersfand said rock shatt,. ,a leverv for actuatingsaid roc-kshatt to reciprocate the plungers Within the alined i openings tormedin the sidewalls of the mold form, and a spring controlled tamper d VJframe mounted on said base support for tamping the plastic material as-the same is introduced to the mold form.

in Witness that I claim the foregoing I have hereunto subscribed my yname this v30th day of April, 19.26.A 

